21140124107 has 2 divisors, whose sum is σ = 21140124108. Its totient is φ = 21140124106.

The previous prime is 21140124091. The next prime is 21140124127. The reversal of 21140124107 is 70142104112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21140124107 - 2⁴ = 21140124091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21140124127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570062053 + 10570062054.

It is an arithmetic number, because the mean of its divisors is an integer number (10570062054).

Almost surely, 2^21140124107 is an apocalyptic number.

21140124107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140124107 is an equidigital number, since it uses as much as digits as its factorization.

21140124107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21140124107 its reverse (70142104112), we get a palindrome (91282228219).

The spelling of 21140124107 in words is "twenty-one billion, one hundred forty million, one hundred twenty-four thousand, one hundred seven".